Engraving-machine



- (Mode1.)..

S. D. ENGLE.

ENGRAVING MAGH'INE.

No. 275,618.. Patented Apr.1 0,1883.

WITNESSES: INVENTOR:

I M, dfirv f ATTORNEYS.

UNITED STATES PATENT OFFICE.

STEPHEN D. ENGLE, OF HAZLETON, PENNSYLVANIA.

ENGRAVlNG-MACHINE.

SPECIFICATION forming part of Letters PatentNo. 275,618, dated April 10, 1883.

Application filed November 22, 1882. (MorleL) To all whom it may concern:

Be it known that I, STEPHEN D. ENGLE, of Hazleton, in the county of Luzerne and State of Pennsylvania, have invented a new and Improved Engraving-Machine, of which the following is a full, clear, and exact description.

My improvements relate to engraving-machines of the class shown in Letters Patent granted to me September 6,1881, No. 246,737 and the invention consists in certain features of improvement, as hereinafter described and claimed.

Reference isto be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a front perspective view of the machine. Fig. 2 is aside elevation, partlyin section. Fig. 3 is a plan view of the workclam p. Fig.4 showsthe graving-toolin larger size. Fig. 5 represents the type made use of in the machine.

, A is the main standard of the machine, carrying the adjustable bracket B, that supports the work-bed. O is the pantograph-arm, suspended by a gimbal at D from the top of the standard-A, and fitted at its lower end with a pivoted arm, a, that carries the tracer b. r c is the toolarin pivoted on the upper end of the aforesaid.

pantograph-arm (J, and adjustable length wise of the same. These parts are substantially similar to those shown in the Letters Patent Upon the base of the machine is a typeclamp, consisting of a fixed bar, 11, and a movable bar, e, upon rods that are fitted with nuts f, so that the bar 0 can be moved to clamp the type. The type plates 9 are formed with tongues g, that project between the bars (1 and 0, so as to be clamped thereby; and these tongues are formed on the plate at a uniform distance from the lower edges, and on the smaller letters come near the upper edges of the plate, so that all, unnecessary and useless metal in the plates is dispensed with. The type are cast instead of being cut, as usual,

. and can thus be made to lie solidly and fit closely. The tracer-arm a is fitted with a lever, h, which connects by a rod, h, to the toolarm a, for moving the tool down upon the work, as in my previous patent. Upon the rear end of the tool-arm is a pendant, i, that receives one or more weights, k, that serve to balance the tool-arm, and thus regulatethe pressure on the cutter when fine lines are being made. On the forward end of the toolarm is pivoted an arm, Z, that extends at one side, and is provided at its outer end with a rod, 1. The lower end of the rod Z enters a hollow post, m, and is clamped therein by a set-screw, m. The tube mis connected to the base of the machine by a ball-and-socketjoint at n, and the upper end of the rod 1 is connected to the arm I by a ball-and-socketjoint at n, so. as to allow the cutter, which .is attached on the inner end of the arm l, to be carried across the work and remain in nearly a verticalplane at all times. To the anal is attached a spring-arm, 0, from which a chain or wire, 0, extends downward to a convenient position for being drawn on by the operator for use in giving additional pressure to the cutter in shading the letters.

v The work-bed is carried by a s1ide,p, thatis' consisting of a plate, 8, pivoted at s to the upper face of the part of the work-bed lettered q,

and provided with the upwardly-projecting longitudinal flange s and curved slot t the plate 8 being adapted to be clamped in any position by the screw 25'. a is a clamping-plate lying on the plate a, and provided with an upwardly-projecting flange, s. The flanges s s* are provided with upwardly-proj ecting pins on their upper edges to clamp the work, and are adjusted to and fro by screws t. The lower plate, 8, being pivoted, can be turned to the right or the left, and is guided and clamped byv a screw, 25, passing through a curved slot, t in the plate 8 into the bed g. This construction allows for every possible variety of too adjustment required by the work.

In arranging the machine for work the article to be engraved is to be fastenedin the clamp upon the bed, and the bracket Bis then raised 2' a rmen or lowered, and the tool-arm 0 correspondin gly raised or lowered upon the pantographarm, so as to bring the tool-arm in a horizontal position. The rod 1 is then to be adjusted in the tube at to bring the arm I to a horizontal position. The tracer is then moved by hand over the lines of the type, the lover or trigger h being at" the same time pressed upon to bring the cutting-tool down upon the work. For shading the letters the cord or chain 0 is to be drawn down by means of the ring at its lower end, so as to give the required pressure upon the spring 0, the pressure being regulated to increase or diminish the shading, as required.

The cutter which I use, and as shown in larger size in Fig. 4, has its point made in the form of a semi-cone, that being the form required in order to do the engraving properly. A crook in the shank adapts the cutter to inside work, but for outside work will not be required. The lines of the types shown in Fig. 5a1Gll0tC0lltllll lOllS. Theportions forming the npstrokes do not run into or join the shaded or down strokes. This peculiarity is the samein both capital and lower-case letters, the advantage being that as the shaded strokes are the heaviest to out, if they were run into the npstrokes, there would be a liability of the tracer being diverted or run out of place. The shading formed by the cutter is wide enough to cut over, so as to connect the upstroke with the shaded portion in the complete work. All the letters are to be formed in the same manner.

This machine can be readily used for all varieties of engraving-such as spoons, forks, rings,thimbles,coflin-plates,&c.-the work can be rapidly done, the machine is simple to operate, and itis easily kept under perfect control.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. In engraving-machines, a work-bed consisting of the two parts q q, having their outer edges hinged to each other, the lower part, q, being provided with a curved slotted armyr, and the upper part, q, with a set-screw, r, passing through the slot in the arm and into the upper part, q, so that the latter may be set at any desired inclination, as set forth.

2. The combination, with a work-bed, of the plate a, pivoted to the work-bed at s, and provided with the curved slot t having set-screw t, and flange 8, having pins on its upper edge, clamping-plate 8 provided with flanges s, having pins on its upper edge, and adjustingscrews t, substantially as shown and described.

3. The combination, with the adjustablyhinged work-bed q q, of the pivoted plate s, provided with the curved slot t and flange s, clamping-plate 8 having flange s, adjustingserews t, and tool-carrying arm 0, substantially as shown and described.

4. The combination of the adj ustahly-hin ged work-bed q q, having longitudinal flanges 0' 0" on its under face, and slide 1), having longitudinal flanges on its upper face, substantially as shown and described, whereby the inclination of the part q of the work-bed may be varied and the work -bed adjusted lengthwise on the slide, as desired.

5. The combination, with the vertically-adjustable bracket B, of the adjustable slide provided with transverse flanges on its lower face and longitudinal flanges on its upper face, adjustably-hingedwork-bed q q, having lon gitudinal flanges onits under face,pivoted clamping-plates s s, constructed as set forth, and adjusting-screws t, substantially as shown and described.

6. In engraving-machines, the combination, with the pivoted arm 0 and the pantographarm (3, of the pivoted arm I, carrying the graving-tool, and held at its outer end by a jointed rod, 1, substantially as described.

7. In engraving-machines, the combination of the jointed arm 0, the arm l, pivoted thereto and carrying the graving-tool, the rod 1, connected by a ball-joint to the tool-arm, and tube m, provided with clamping-screws m, and connected by a ball-and-socket joint, a, to the base of the machine, substantially as shown and described.

STEPHEN D. EXGLE.

Witnesses:

G. F. KisNER, W. F. MARTZ. 

